Tanzanite Storage — 283 MW battery storage, TX

Tanzanite Storage — 283 MW battery storage, TX · Ask the Grid

Generation and physical site

EIA plant 69026 · Inventory for Aug 2026.

Reported operating nameplate by technology

Battery storage: 283.2 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (1)

EIA generator status and nameplate capacity for Tanzanite Storage
Generator	Technology	Status	Power (MW)	Energy (MWh)
TANZ	Batteries	Operating	283.2	283.2

Physical map location · OpenStreetMap: 32.23249, -95.83819
Filed location · EIA: 32.23084, -95.83760

Sources and observation dates

Inventory source: EIA-860M workbook (preliminary)
EIA reporting month: Aug 2026
EIA retrieved: Oct 10, 2026
OSM extract: Oct 9, 2026
OSM last mapped edit: Sep 18, 2026
Map prepared: Oct 10, 2026
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
TANZ	283.2 MW 257.8 MW summer	Batteries Electricity used for energy storage · BA	Nov 2025	Operating

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Dec 12, 2023
Dec 12, 2023
Tax reinvestment zone designationthemonitor....
Henderson County Commissioners Court designated the Tanzanite Storage site as a tax reinvestment zone. County officials reported the site as approximately 12 acres and identified Belltown Power Texas's COO as the project developer.
Jan 2024
Jan 2024
Tax abatement agreement approvalathensrevie...
Henderson County Commissioners Court approved a tax abatement agreement for Tanzanite Energy Storage LLC.
Nov 2025
Nov 2025
Generator enters operationEIA-860
EIA-860 lists generator TANZ with this operating date.
Aug 13, 2026
Aug 13, 2026
Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.

Sources

PublisherReferenceType

U.S. Energy Information AdministrationEIA-860 generator inventoryFederal registry

U.S. Energy Information AdministrationEIA-923 generation filingsFederal filing

ERCOTERCOT 60-Day SCED disclosureMarket disclosure

Common questions about Tanzanite Storage

Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.

How big is Tanzanite Storage?

Tanzanite Storage reports 283.2 MW battery storage of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.

What kind of plant is Tanzanite Storage?

Tanzanite Storage is a batteries facility in Henderson County, TX, participating in the ERCOT market.

Where is Tanzanite Storage located?

Tanzanite Storage is in Henderson County, TX, inside the ERCOT balancing area.

Who operates Tanzanite Storage?

Tanzanite Storage is operated by Tanzanite Energy Storage LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Tanzanite Storage generate?

Tanzanite Storage reported 97.1 GWh over the twelve months to 2026-07. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.

How does Tanzanite Storage compare to other plants?

By capacity, Tanzanite Storage ranks #27 of 1,061 operating plants of the same technology nationally. It ranks #8 of 254 in TX.

Co-located assets

Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.

Malakoff Solar ProjectSolar PhotovoltaicSolar Photovoltaic10 MW18 km Pauline BESSBatteriesBatteries · same type10 MW24 km

Overview

Infrastructure record

Overview

Infrastructure record

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Structured profile

Generation and physical site

Reported operating nameplate by technology

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Units and generators

Performance

Peer context

Monthly generation

ERCOT disclosed dispatch

Dispatch

Output by hourlocal time · 90 days through Aug 13, 2026

Latest disclosed outputhourly · 2 weeks ending Aug 13, 2026

Settlement price economics

Grid and market context

Market registration

Operating context

Interconnection record

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Related parties and identifiers

Relationship graph

Parties and identifiers

Reporting portfolio